Sound suppressing ventilator fitting for windows



July 5, 1932.,v E F 1,866,201

SOUND SUPPRESSING VENTILATOR FITTING FOR WINDOWS Filed March 19, 1950mlwf/vm/a ii w.

Patented July 5, 1932 UNITED STATES ERNEST THOMAS FISK, F SYDNEY, NEWSOUTH WALES, AUSTRALIA SOUND SUPPRESSING VENTILATOR FITTING FOR WINDOWSApplication filed March 19, 1930, Serial No. 437,178, and in AustraliaJuly 27, 1927.

The object of this invention is to provide means for screening casementwindows when open against the entry of external noises.

The invention is illustrated in the accompanying drawing, in which:

Fig. 1 is a perspective view showing a vertical sound proof panel hingedto the free vertical edge of an open casement sash and a horizontallydisposed sound proof panel structurally adapted to protect the spacebetween the lower edge of the window aperture and the lower edge of thevertical sound proof panel.

Fig. 2 is a vertical transverse section of the arrangement shown in Fig.1.

16 and 17 are the casement sashes, 12a the vertical sound proof paneland 13 the horizontally disposed sound proof panel. The panel 12a ishinged at 24a the sash 16, and the panel 13 is hinged at 25 to the loweredge of the window aperture. The lower panel 13 may be constructed as ahollow cell as shown in Fig. 2 or it may be solid. It may be of anysuitable opaque, transparent or translucent material, or it may be madeof sound absorbent material, or lined with sound absorbent material. Itis preferably provided with ventilating apertures 13a through whichventilating air passes freely and when con structed as a hollow cellsound waves are absorbed in the enclosed air space.

The panel 12a is transparent or translucent to facilitate the passage oflight. The sash 16 in combination with the panels 12a and 13 when placedin the position shown in the drawing constitutes an enclosure whichpromotes ventilation and allows the passage of air out of and into theapartment while minimizing by reflection and absorption 40 entry ofsound waves from outside the apartment. 7

The vertical sound proof panel 12a is hingedat 24a to the easement sash16. The sound proof panel 13 is hinged to the lower edge of the windowaperture and extends outward so that it fills the space between thelower edges of the sash 16 and the panel 12a.

The method of treating double casement windows may be varied by hingingone vertical sound proof panel to each of the casement sashes and makingprovision for the free edges of the two vertical panels to meet when thesashes are opened and the sound proof panels are in position. Theoutward extending panel in this case extends from the lower edge of thewindow aperture to the lower edges of the two vertical panels.

What I claim as my invention and desire to secure by Letters Patent is 1A sound suppressing ventilating attachment for casement windowscomprising a casement sash and an auxiliary panel structurally adaptedto form two sides of a triangular hopper like structure, the othersideand the top of" which are left open and a panel extending outward fromthe lower edge of the window aperture constituting the bottom of saidhopper like structure.

2. A sound suppressing ventilating attachment for a casement window,comprising a casement sash, an auxiliary panel hingedly attached to saidsash, said casement sash and said auxiliary panel together constitutingtwo sides of a hopper-like structure, the other side and the top ofwhich are left open and 7f apanel extending outward from the lower edgeof the window aperture constituting the bottom of said hopper-likestructure.

In testimony whereof I affix my signature.

ERNEST THOMAS FISK. so

